Maplestory is an online multi-player game, there are four different jobs at the moment, there are adventurers these branch off to 5 other classes( Warrior,Bowman,Theif,Pirate and Magician), Then the 2nd job Cygnus Knights who again branch off to different classes same as adventurers but have a specific element e.g Thunder Breakers( Cygnus Knight Pirate) or Night Walkers( Cygnus Night Theifs) and my favourite Arans they use combo and warrior items, but they can only use their skills when using a 'polearm' type of weapon when you attack you have to keep tapping CTRL for skills( It makes your fingers hurt!) and last but not least Evans they are like Magicains but they use dragons to attack. P.S There is a prophecy that there are 5 jobs the 5th one( not out In Global Maplestory, the one I play) is called 'DualBladders' like the theif jobs 'bandit' only with two daggers, it is going to be awesome, coming out in September for Global MapleStory (GMS) but already out in Korean Maplestory(KMS) search it on youtube maybe.

Below are a video on all the 'jobs':

Adventurers( beware as this is either the Ninetendo DS version or a very, very old version of the game)
The character in this video is 'Tiger' he was the first player to reach the highest level of 200, later he was caught using nx sites other than the main Nexon site and was banned.


Cygnus Knights ( Newer version of the game)




Arans:



Evans: